Cell Cycle Phases

Question 1

The Cell Cycle consists of

Answer 1

Interphase + Mitosis

Question 2

Interphase pertains to

Answer 2

Cell growth (no division)

Question 3

Most cells are found in which phase of the cycle?

Answer 3

Interphase

Question 4

What are the parts of interphase?

Answer 4

• G1
• S
• G2

Question 5

G1 is the growth phase which is also the

Answer 5

Longest phase

Question 6

What happens during the G1 phase?

Answer 6

Extra organelles like ribosomes + proteins are produced

Question 7

After G1, cells can go to either

Answer 7

G0 or S

Question 8

Which cyclins are produced during G1?

Answer 8

CycE or CycD

Question 9

S Phase is the Synthesis phase in which there is

Answer 9

DNA replication of 23 pairs

Question 10

Which cyclins are produced during S phase?

Answer 10

Cyclin A, which binds with CDK to activate DNA replication

Question 11

G2 is the growth phase in which the cell

Answer 11

Prepares for mitosis

Question 12

What happens during the G2 phase?

Answer 12

Microtubules are made

Question 13

Which cyclins are produced during G2 phase?

Answer 13

Cyclin B to bond with CDK 1

Question 14

The first checkpoint is found between

Answer 14

G1 and S phase

Question 15

DNA replication is not inhibited when

Answer 15

CDK binds to the Cyclins E and D

Question 16

Second checkpoint is found between

Answer 16

G2 and mitosis

Question 17

CDK gets activated when paired with

Answer 17

Cyclins

Question 18

What is required in order to pass checkpoints?

Answer 18

Cyclin proteins need to present to block any proteins which may interfere with DNA synthesis or replication

Question 19

PB3 is a protein that functions to

Answer 19

Block cell cycle progression

Question 20

P21 is a protein that

Answer 20

Inhibits CDK

Question 21

Rb + P53 are tumor-suppressor genes, so a defect can result in

Answer 21

Cancer

Question 22

Most of the cell’s life and DNA replication occurs during

Answer 22

Interphase

Question 23

How are chromosomes in interphase?

Answer 23

Not tightly bound, rather in chromatin form